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Critical Care Medicine www.ccmjournal.org e111 The authors reply: We thank Kuiper et al (1) for their letter. We are in complete agreement that the implementation of donation after circulatory death (DCD) is followed by a significant increase in organ donation. The United Kingdom is a world leader in controlled DCD, with this form of donation accounting for 42% of all U.K. deceased organ donors and 25% of all transplanted organs. This led some to question whether the success of the U.K. controlled DCD programme was at the expense of donation after brain death (DBD). We therefore had a simple ambition for our article—to use the extensive U.K. audit data to attempt to answer the common question—how does the introduction of a DCD programme impact on DBD. The Potential to Increase Organ Donation After Death by Circulatory Criteria